Hello. It is very sad to hear that you are going through this.
There are thousands of scammers working with hundreds of different methods on every platform in every industry. But it is true that these scammers are mostly on telegram especially targetting crypto users thanks to telegram account mechanics 
telegram allows you to create an identical account with someone using the same name and profile picture (but for the username tag they can’t fake it you must pay attention to it-watch for capital letters too-)
Therefore we got our community chat verified (a badge given to official channels only by Telegram) and warn and try to educate our community about such scam attempts/fake groups/impersonators 7/24 with infographics/pinned messages and by often posting relevant warnings on main chat.
Our telegram verification mark
the Community Mod tag must be checked before sending a DM/PM to any Mod/Admin for support, etc.
some infographics/warning posts
recurring pinned welcome post
Crypto communities are very active on telegram and I believe we have to offer such services and support there as well.
Again, I’m really sorry for what happened to you